Journal ArticleDOI
Bioaugmentation and anaerobic treatment of pharmaceutical effluent in fluidized bed reactor.
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TLDR
The start-up of an anaerobic fluidized bed reactor was carried out using a single inoculum and later on with multiple inoculum to achieve a faster start- up and the effect of hydraulic retention time (HRT) on COD removal (%) and biogas production was studied.Abstract:
The start-up of an anaerobic fluidized bed reactor was carried out using a single inoculum (supernatant of anaerobic digester) and later on with multiple inoculum (a mixture of supernatant of anaerobic digester and volatile fatty acid (VFA)) to achieve a faster start-up. Then regular experiments were carried out to study the effect of hydraulic retention time (HRT) on COD removal (%) and biogas production. The pharmaceutical effluent with COD of 2000 to 4000 mg/L was treated in a fluidized bed reactor using an enricher-reactor concept with a hydraulic retention times of 3 (Uf = 6 Umf) to 24 (Uf = 1.5 Umf) hr. The maximum COD removal (%) of 91.2 and a maximum biogas production of 5.62 L/d were obtained at 24 hr HRT for a maximum COD concentration of 4000 mg/L corresponding to a fluidization velocity (Uf) of 20 m/hr (1.5 Umf) using a granular activated carbon bed of average size 700 microns.read more
Citations
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Journal ArticleDOI
Bioaugmentation of syntrophic acetate-oxidizing culture in biogas reactors exposed to increasing levels of ammonia.
TL;DR: The findings further demonstrate the strong influence of ammonia on the methane-producing consortia and on the representative methanization pathway in mesophilic biogas reactors.
Journal ArticleDOI
Relating Anaerobic Digestion Microbial Community and Process Function
TL;DR: More work is required to realize robust, quantitative relationships between microbial community structure and functions such as methane production rate and resilience after perturbations and to describe microbial communities in digester function.
Journal ArticleDOI
Bioaugmentation for improved recovery of anaerobic digesters after toxicant exposure.
TL;DR: In conclusion, bioaugmentation with an H(2)-utilizing culture is a potential tool to decrease the recovery period, decrease propionate concentration, and increase biogas production of some anaerobic digesters after a toxic event.
Journal ArticleDOI
Impact of bioaugmentation by compost on the performance and ecology of an anaerobic digester fed with energy crops.
L. Neumann,Paul Scherer +1 more
TL;DR: Fluorescence in situ hybridization indicated that probably an archaeal population shift was responsible for the observed stimulations and an addition of compost induced a methanogenic community change towards hydrogenotrophic methanogens.
Journal ArticleDOI
Bioaugmentation as a useful strategy for performance enhancement in biological wastewater treatment undergoing different stresses: Application and mechanisms
Qian-Qian Zhang,Qian-Qian Zhang,Guang-Feng Yang,Lei Zhang,Zheng-Zhe Zhang,Guang-Ming Tian,Ren-Cun Jin +6 more
TL;DR: The operation of biological processes may face the challenges of system instability and performance deterioration under different stresses, including transient shock of toxic matters/substrates in the biological processes as discussed by the authors.
References
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Journal ArticleDOI
Carboxylation and mineralization of m -cresol by a sulfate-reducing bacterial enrichment
K. Ramanand,Joseph M. Suflita +1 more
TL;DR: An enrichment culture that anaerobically degradedm-cresol under sulfate-reducing conditions was obtained from an anoxic aquifer and the stoichiometry of electron acceptor consumption and carbon mass balances confirm thatm- cresol was mineralized by the culture.